Josh Allen was bleeding from the mouth. That was abundantly clear to his teammates because the Buffalo Bills quarterback was smiling widely — though maybe not brightly because the blood leaked down to his teeth.

Bills quarterback Josh Allen, who's playing the best football of his seven-year career, entered the final game of the regular season with 3,731 passing yards and 28 touchdowns, along with 531 rushing yards, 12 rushing touchdowns, and 1 receiving touchdown.